Can also mean Certificate of Deposit, or a type of bank account that is stored for a certain period of time called the maturation period, and cannot be accessed until that time period is over. It also has a fairly high interest rate.

Van Quyen, a footballer of Song Lam Nghe An team, played an important match against The Cong team in Hanoi, Vietnam, on last Saturday. That night, he took a call girl to his hotel room. First, Van Quyen took off his shirt and the call girl could see “Reebok” on his left arm. Then, he took off his trousers, and the call girl saw “Nike” on his right thigh. Finally, he took off his Y-fronts, and the call girl felt a bit embarrassed and used her hand to hide and saw “ad” in (Adidas) on the pubic area of Van Quyen and in panic she thought that "ad.." is "aids". She said “are you HIV positive?”. “Nope!”, Van Quyen answered. Well, my tattoos advertise “Nike”, “Reebok” and “Adidas”. “Well, now, CD!!!!!!!!!!!” Call girl asked.